Answer
$300\ J$
Work Step by Step
We know that:
Mass of the snow ball $m=1.50\ kg$
Initial velocity of snow ball $v_i=20\ m/s$
Therefore, the Initial kinetic energy $KE_i = \frac{1}{2}mv_i^2$.
Substituting and solving:
$KE_i = \frac{1}{2}(1.5\ kg) (20\ m/s)^2$
$KE_i =300\ J$
